219047300645 has 4 divisors (see below), whose sum is σ = 262856760780. Its totient is φ = 175237840512.

The previous prime is 219047300609. The next prime is 219047300657. The reversal of 219047300645 is 546003740912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131124376321 + 87922924324 = 362111^2 + 296518^2 .

It is a cyclic number.

It is not a de Polignac number, because 219047300645 - 2¹⁸ = 219047038501 is a prime.

It is a super-2 number, since 2×219047300645² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21904730060 + ... + 21904730069.

It is an arithmetic number, because the mean of its divisors is an integer number (65714190195).

Almost surely, 2^219047300645 is an apocalyptic number.

It is an amenable number.

219047300645 is a deficient number, since it is larger than the sum of its proper divisors (43809460135).

219047300645 is an equidigital number, since it uses as much as digits as its factorization.

219047300645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43809460134.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 219047300645 in words is "two hundred nineteen billion, forty-seven million, three hundred thousand, six hundred forty-five".